A chemistry graduate student is given 300. mL of a 1.10M hydrocyanic acid (HCN) solution. Hydrocyanic acid is a weak acid with K = 4.9 × 107 . What a mass of NaCN should the student dissolve in the HCN solution to turn it into a buffer with pH = 9.45? You may assume that the volume of the solution doesn't change when the NaCN is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits. 0 X

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.